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Figure 96.-
A/V carrier ratio
3.3.4.3.1.3.- Automatic C/N
The C/N measurement is also displayed on the lower part of the screen.
As is the case with the V/A measurement, the carrier level is measured in the spectrum’s central
frequency
The equipment selects the frequency that is used to measure the noise.
3.3.4.3.1.4.- Referenced C/N
In the case of the referenced C/N, the frequency that is used to measure the noise must be
selected by the user. When using this function, a second blue marker appears on the spectrum,
indicating the frequency that is being used to measure the noise.
Figure 97.-
Referenced C/N
To access the submenu of this function where the frequency at which the noise level is
measured and the channel bandwidth are selected, you must press the
Clear/Menu
button.
The menus will appear again and we can select these parameters. The options for these
Marker
indicating
the noise
frequency
Multimetter FSM 500
Ref. 5903
81